Is it possible to use WideCharToMultiByte with Letterlike Symbols [like "™"]?

[heitor]

Help!

I need to send and string over internet from a Windows [client side] system to a UNIX [server side] ...

In the client side I have a std::wstring data and I "translate" this data to an UTF-8 std::string before send it to avoid problems in server side. To do that, I´m using WideCharToMultiByte func []Content not found.

However, I´m facing a problem to send "Skype ™ 4.2.2". The following error is launched in server side:
"... a wide character has been encountered that can not be represented as a multibyte sequence (according to the current locale) [Skypeâ
¢ 4.1] : [Invalid or incomplete multibyte or wide cha ..."

I wrote a sample code to illustrate what I´m trying to do:

void main()
{
std::wstring wide = L"Skype ™ 4.2.2";
std::string normal = "";
char codePgBuf[4096];
wchar_t wcodePgBuf[4096];

if (WideCharToMultiByte(CP_UTF8, 0, wide.c_str(), -1, codePgBuf, sizeof(codePgBuf), NULL, NULL) == 0)
printf("WC2MB failed for %u : '%S", GetLastError(), wide.c_str());
normal = codePgBuf;

FILE *pFile;
pFile = fopen("test.txt", "w");
if (pFile!=NULL)
{
fputs(normal.c_str(), pFile);
fclose (pFile);
}
}



The result of this program is an file [test.txt] with this content:
Skype â„¢ 4.2.2

WTF is going on? What am I doing wrong? Any guess?

Is it possible to use WideCharToMultiByte with Letterlike Symbols?

Many thanks,

[Codeplug]

You shouldn't put extended character literals directly into your source code. The value can change depending on how source editor saves the file.

#include <windows.h>
#include <string>
#include <vector>
#include <fstream>
#include <iostream>

std::string wstr_to_str(const std::wstring &wstr, UINT cp = CP_ACP)
{
    int len = WideCharToMultiByte(cp, 0, wstr.c_str(), (int)wstr.length(), 
                                  0, 0, 0, 0);
    if (!len)
        return "ErrorA";

    std::vector<char> abuff(len + 1);

    // NOTE: this does not NULL terminate the string in abuff, but this is ok
    //       since it was zero-initialized in the vector constructor
    if (!WideCharToMultiByte(cp, 0, wstr.c_str(), (int)wstr.length(), 
                             &abuff[0], len, 0, 0))
    {
        return "ErrorA";
    }//if

    return &abuff[0];
}//wstr_to_str

using namespace std;

int main()
{
    const wchar_t TM = 0x2122;
    wstring wide;

    wide = L"Skype ";
    wide += TM;
    wide += L"4.2.2";

    string utf8 = wstr_to_str(wide, CP_UTF8);

    ofstream f("test.text", ios::out | ios::binary);
    if (!f)
    {
        cerr << "Failed to open file" << endl;
        return 1;
    }//if

    f.write("\xEF\xBB\xBF", 3); // UTF8 BOM
    f.write(utf8.c_str(), utf8.length());
    f.close();

    return 0;
}//main

gg